Melt chocolate over a double boiler.
Set out 12 mini patty pans on a small oven tray.
Spoon 1 TSP of melted chocolate into each patty pan, swirling around to ensure the bottom and sides are well coated. Let any excess chocolate drip out and place in the freezer to harden (approx. 15 minutes).
Once the chocolate cups have set, spoon 1 TSP of COCO² Hazelnut into 4 of the cups, almond butter into 4 of the cups, and peanut butter into the remaining 4 cups.
Seal the cups with the remaining melted dark chocolate, and sprinkle with finely chopped nuts to differentiate the three flavours.
Place in the fridge or freezer to set. These should keep in the fridge for around 7 days, or in the freezer for 3 months (just take them out about 10 minutes before ready to enjoy).